C# 面试题目 单链表中删除重复数据

static Node RemoveDup(Node link)
{
Node p1 = link;
Node p2 = p1.next;
Node pr = p1;

while (p1 != null)
{
pr = p1;
p2 = p1.next;

while (p2 != null)
{
if (p1.data == p2.data)
{
p2 = p2.next;
pr.next = p2;
}
else
{
pr = p2;
p2 = p2.next;
}
}

p1 = p1.next;
}

return link;
}